Therefore, there are some HP customized drivers such as iLO has been removed. After the upgrade, iLO from HP Blade management web console using Integrated iLO is failed to load (still able to load if using java applet).

From vsphere client Hardware Status Tab, the onboard management i could not find the iLO. (it is not installed)

Therefore, I would like to ask if anyone has any idea which drivers i should install manually to esxi host?

I have installed following drivers downloaded from HP site and with no success iLO after reboot:

If you have questions concerning the compability of the versions and which drivers and firmware should be installed, I would recommend you to have a look at the recipe, where the recommended versions are given.

Before they flashed the firmware, the upgrade using the HP media you mentioned above was failing.They flashed their firmware using the Emulex Offline Updater to a newer version and now the upgrade is working.

With the SPP and HP SUM versions released in 2013, you can now Flash firmware of an ESXi 5.x host while its running and then just reboot (do the drivers via VUM or ESXCLI or something too).EXCEPT that the CNA/FC Firmware is not yet compatible with that process and must be done offline.You can either boot from the SPP ISO which can take quite a while, or if you don't mind the manual nature of the Emulex utility, use that because its much faster. (30MB vs 3GB)